Testing Generator: Improvements

Follow-up to #1156

Creates parity with Rails' decision to [use a headless driver by
default][headless].

This will be fixed in an [upcoming release][rspec] of rspec-rails, but I
felt it was important to capture here. Additionally, it ensures the
`screen_size` is the same as what is set in Rails.

Removes `webdrivers` dependency in favor of `selenium-webdriver`. This
generator assumes the app was generated with the `--skip-test`, which
means we need to add the `selenium-webdriver` and `capybara` gems.

Updates `action_dispatch-testing-integration-capybara` dependency to the
most recent tagged release in an effort to suppress Dependabot
notifications.

[headless]:drive://github.com/rails/rails/pull/50512
[rspec]: rspec/rspec-rails#2746

lib/generators/suspenders/testing_generator.rb

@@ -10,11 +10,12 @@ def add_gems
         end
 
         gem_group :test do
+          gem "capybara"
           gem "action_dispatch-testing-integration-capybara",
-            github: "thoughtbot/action_dispatch-testing-integration-capybara", tag: "v0.1.0",
+            github: "thoughtbot/action_dispatch-testing-integration-capybara", tag: "v0.1.1",
             require: "action_dispatch/testing/integration/capybara/rspec"
+          gem "selenium-webdriver"
           gem "shoulda-matchers", "~> 6.0"
-          gem "webdrivers"
           gem "webmock"
         end
 
@@ -59,7 +60,7 @@ def create_system_spec_dir
       end
 
       def configure_chromedriver
-        copy_file "chromedriver.rb", "spec/support/chromedriver.rb"
+        copy_file "driver.rb", "spec/support/driver.rb"
       end
 
       def configure_i18n_helper

lib/generators/templates/testing/driver.rb

@@ -0,0 +1,5 @@
+RSpec.configure do |config|
+  config.before(:each, type: :system) do
+    driven_by :selenium, using: :headless_chrome, screen_size: [1400, 1400]
+  end
+end

test/generators/suspenders/testing_generator_test.rb

@@ -18,9 +18,10 @@ class TestingGeneratorTest < Rails::Generators::TestCase
           end
 
           group :test do
-            gem "action_dispatch-testing-integration-capybara", github: "thoughtbot/action_dispatch-testing-integration-capybara", tag: "v0.1.0", require: "action_dispatch/testing/integration/capybara/rspec"
+            gem "capybara"
+            gem "action_dispatch-testing-integration-capybara", github: "thoughtbot/action_dispatch-testing-integration-capybara", tag: "v0.1.1", require: "action_dispatch/testing/integration/capybara/rspec"
+            gem "selenium-webdriver"
             gem "shoulda-matchers", "~> 6.0"
-            gem "webdrivers"
             gem "webmock"
           end
         RUBY
@@ -90,40 +91,18 @@ class TestingGeneratorTest < Rails::Generators::TestCase
         end
       end
 
-      test "configures Chromedriver" do
+      test "configures driver" do
         expected = <<~RUBY
-          require "selenium/webdriver"
-
-          Capybara.register_driver :chrome do |app|
-            Capybara::Selenium::Driver.new(app, browser: :chrome)
-          end
-
-          Capybara.register_driver :headless_chrome do |app|
-            options = ::Selenium::WebDriver::Chrome::Options.new
-            options.headless!
-            options.add_argument "--window-size=1680,1050"
-
-            Capybara::Selenium::Driver.new app,
-              browser: :chrome,
-              options: options
-          end
-
-          Capybara.javascript_driver = :headless_chrome
-
           RSpec.configure do |config|
             config.before(:each, type: :system) do
-              driven_by :rack_test
-            end
-
-            config.before(:each, type: :system, js: true) do
-              driven_by Capybara.javascript_driver
+              driven_by :selenium, using: :headless_chrome, screen_size: [1400, 1400]
             end
           end
         RUBY
 
         run_generator
 
-        assert_file app_root("spec/support/chromedriver.rb") do |file|
+        assert_file app_root("spec/support/driver.rb") do |file|
           assert_equal expected, file
         end
       end